Anisotropy of Out-of-Phase Magnetic Susceptibility: A Non-Standard Approach for Magnetic Subfabrics Determination in Variscan Granites of Iberian Massif

The magnetic susceptibility measured in an alternating field is made up of in-phase and out-of-phase components. Anisotropy Magnetic Susceptibility (ipAMS) measures the bulk response all minerals a sample; however, AMS (opAMS) sensitive to only select ferromagnetic such as hematite, titanomagnetite, ultrafine magnetite. opAMS can be harnessed tool for direct determination subfabrics defined by minerals. This work focuses on following three Portuguese plutons: Lamas de Olo, Lavadores-Madalena, Santa Eulália. results show that lower opAMS, degree anisotropy much higher ellipsoid shape parameter has no significant differences. ipAMS tensors are, general, coaxial, which indicates standard fabric parallel subfabric